Role of organic additives in the sol-gel synthesis of porous CaF2 anti-reflective coatings

Shinobu Fujihara, Yasuhiro Kadota, Toshio Kimura

Research output: Contribution to journalArticle

35 Citations (Scopus)

Abstract

Porous CaF2 anti-reflective coating films were prepared by the sol-gel method. Effects of organic additives on deposition and optical properties of the films were investigated. Amino alcohols (2-aminoethanol, 2-dimethylaminoethanol, and triethanolamine) and alcohols with larger molecular weights (ethyleneglycol, 2-methoxyethanol, cyclohexanol, and 2-(2-n-butoxyethoxy)ethanol) were chosen as the organic additives. Among these additives, cyclohexanol was the most effective to control the surface morphology and the optical properties of the films. By changing the amount of cyclohexanol in the coating solution, it was possible to control the optical thickness of the CaF2 films. Accordingly, the wavelength giving the maximum transmittance could be changed in the UV region.

Original languageEnglish
Pages (from-to)147-154
Number of pages8
JournalJournal of Sol-Gel Science and Technology
Volume24
Issue number2
DOIs
Publication statusPublished - 2002 Jun 1

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Keywords

  • Anti-reflective coating
  • CaF
  • Sol-gel
  • Thin film

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Chemistry(all)
  • Biomaterials
  • Condensed Matter Physics
  • Materials Chemistry

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